Mtn ****med me!

Mtn called me in October to tell me that I was a loyal customer so I would receive an extra 70 gigs of data every month. I kept on asking the consultant whether I won't be charged anything extra or lose out on the 240 minutes i was receiving till then...she insisted that I would not be charged extra and I wouldn't lose my minutes. Sadly, when November came I received the data but not my minutes..I didn't realise that till now and called Mtn. The consultant who came on after the automated voice was busy having a conversation in the background whilst I was calling out "hello hello" eventually, she took my call and apologised for having a background conversation whilst I was waiting for a reply. She informed me that my contract switched to data only and no minutes. I am incredibly upset as I was so boastful about being a loyal mtn customer and receiving extra 70 gigs data. Sadly, Mtn ****med me!